Smoke-preventing device.



J. R. MORTON & W. H. STODDARD.

SMOKE PREVENTING DEVICE. APPLIOATION FILED 1130.21, 1908.

945,339, Patented Jan. 4, 1910.

2 SHEETS-SHEET 1.

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animators J. R. MORTON & W. H. STODDARD. SMOKE PREVENTING DEVICE.

APPLICATION FILED DEC. 21 1908. 945,339. Patented Jan. 4, 1910.

2 SHEETS-SHEET 2.

UNITED T OFFICE.

JUDSON It. MORTON AND WILLIAM H. STODDARD, 013 DETROIT, MICHIGAN.

SMOKE-PREVENTING DEVICE.

Specification of Letters Patent.

Application filed December 21, 1908.

Patented Jan. 4, 1910. Serial No. 468,602.

To all whom it may concern:

Be it known that we, JUDsoN R. MORTON and WILLIAM H. STODDARD, citizensof the United States, residing at Detroit, in the county of Wayne andState of Michigan, have invented certain new and useful Improvements inSmoke-Preventing Devices, of which the following is a specification.

This invention relates to improvements in smoke consumers or preventersfor steam boiler furnaces, and more particularly to that class of suchdevices in which steam or both steam and air are automatically admittedinto the fire box of the furnace for a predetermined time after theopening of the fuel door.

The object of the invention is to provide a mechanism which will be moresimple and reliable than devices of the same character heretoforeproduced and which has the spe cial advantage of enabling either one oftwo boiler furnaces to be worked by the one mechanism, improved couplingmeans being provided whereby either of the furnaces may be thrown out ofaction.

The above object is attained in the embodiment of the inventionillustrated in the accompanying drawings, in which:

Figure 1 is a front elevation of portions of two steam boiler furnacesshowing the application of the invention thereto; Fig. 2 is a detailhorizontal section taken on the plane indicated by the line 2-2 in Fig.1; F ig. 3 is a perspective view showing one of the coupling devices;Figs. 4 and 5 are detail sectional views taken respectively on theplanes indicated by the lines 4-4 and 5-5 in Fig. 1, and; Fig. 6 is adetail horizontal section taken on the plane indicated by the line 6-6in Fig. 5.

Referring more particularly to the drawings, l and 2 denote the frontportions of two steam boiler furnaces of well known form andconstruction having swinging fire box doors 3 through which fuel is fedto the fire. These doors when opened to replenish or stir up the fire,are adapted to actuate rock shafts 4, 5 arranged in longitudinalalinement with each other and journaled in bearing brackets 6 on thefurnace fronts above said doors. Portions of said shafts are bent toform bow-shaped loops 7 which are disposed adjacent to the upper andinner corners of the doors to serve as lever or crank arms and which areswung upwardly by the doors when opened so as to actuate said shaft inone direction.

Journaled in bearing brackets 8 projecting from the opposing side wallsof the two furnaces is an intermediate rock shaft 9 which is disposedbetween and in longitudinal alinement with the shafts 4, 5 and isadapted to be operatively connected to or disconnected from either orboth of said shafts. The coupling and uncoupling of these three shaftsare preferably effected by forming their adjacent ends with flat facesor squared )ortions, as indicated at 10 in Fig. 3, an arranging slidablecoupling sleeves 11 with similar shaped openings on said portions 10.When it is desired to connect the first mentioned shafts 4, 5 to theintermediate one 9 for simultaneous movement therewith, the sleeves 11are engaged with the flat faced portions 10 of the adjacent shafts andsecured by means of set screws 12 upon the sleeves or by any otherfastening means. When it is desired to disconnect either of the shafts4, 5 from the intermediate one 9, the sleeve 11 of such shaft is slippedinwardly upon it until the sleeve disengages the fiat faced portion orend of the shaft 9 whereupon it may be secured by the set screw which itcarries.

Air is admitted into the fire boxes or combustion chambers of thefurnaces through draft opening 13 formed in their (lead plates l-l andcontrolled by two dampers 15. The latter are connected to arms 16 upon arock shaft 17 journaled in bearings 18 as seen in Figs. 5 and 6 of thedrawings. These rock shafts of the two furnaces are operativelyconnected to the rock shafts 4, 5 respectively by providing upon each ofthe latter an arm 19 and connecting it by a link 20 to one arm of abell-crank 21 which swings in a slot in the furnace front and has itsother arm connected by a link 22 to an arm 23 on the shaft 17, asclearly shown in Fi 5. By reason of these connections, it will be seenthat when the fuel doors 3 of the furnaces are oiened, their dampers 15will be opened to aflmit air to the fire box. Steam is also admittedinto the fire boxes of the furnaces when their doors are opened. This isaccomplished by providing a main steam ipe 24 having two branches 25, 26leading rom the steam spaces of the two boilers and each containing acut-off valve 27. Said main pipe 24 is also provided with two branches28, 29 containing cut-off valves 30 and connected by unions 31 to twosteam pipes extending across the furnace fronts and provided with jets32 which extend through the front walls of the furnaces, as shown inFig. 5, and discharge steam into their fireboXes. In the main pipe 24:is arranged a quick acting valve 33 the stem of which is operated by alever 34: connected by a link 35 to an arm 36 on the intermediate rockshaft 9, so that when the latter is operated the valve 33 will beopened.

The rock shafts at, 5, 9 are actuated in one direction by the opening ofthe furnace doors and in the other direction by gravity, the movement inthe latter direction being controlled by a cushioning or retardingdevice of any suitable form. As illustrated a dash pot or cylinder 37 issuitably mounted on one of the furnaces and its piston 38 has its rodconnected by a link 39 to an arm 40 on the intermediate rock shaft 9. Aby-pass 4:1 is arranged upon the cylinder 37 and contains a regulatingvalve 42 by means of which the closing of the dampers 15 and the valve33 may be controlled.

In operation, assuming both of the rock shafts 4t, 5 to be coupled tothe shaft 9, when one of the furnace doors 2 is opened it will actuateall three of the rock shafts 1, 5, 9. The latter through the operatingconnections above described open the dampers 15, and the valve and alsomove the piston 38 up in the cylinder 37. The admission of air and steaminto the fire boxes of the furnaces increases the combustion whichconsumes the smoke while coal is being put on the fire or when thelatter is stirred up. The descent of the piston in the cushioningcylinder under the weight of the parts connected to it, is gradual, andconsequently, after a predetermined period the dampers 15 and the steamvalve 33 are closed. The

steam discharged into the fire boxes may be taken from either one orfrom both of the boilers by reason of the valve controlled branches 25,26 of the main steam pipe 24; and by reason of the valve controlledbranches 28, 29 and the slip coupling sleeves 11 between the three rockshafts either one of the boiler furnaces may be thrown out of operation.ceedingly advantageous after only one of the furnaces has been inoperation and it is desired to work the other also, since steam from theone already in operation can be fed to the one being fired up.

Having thus described the invention, what is claimed, is:

The combination with a pair of boiler furnaces, of a main steam pipe,valve-controlled branch pipes in communication with the steam spaces ofthe boilers, other valve-controlled branch pipes for admitting steaminto the fire-boxes of the furnaces, a valve in said main pipe, rockshafts journaled upon the furnaces and having cam loops actuated by thefurnace doors, dampers operatively connected to the rock shafts foradmitting air to the fire-boxes of the furnaces, an intermediate rockshaft arranged between and in longitudinal alinement with the firstmentioned rock shafts, independent coupling devices for connecting theadjacent ends of the three rock shafts, means actuated by theintermediate rock shaft for operating the valve in the main steam pipe,and a cushioning device for the intermediate rock shaft.

In testimony whereof we aiiiX our signatures in presence of twowitnesses.

'JUDSON R. MORTON.

VILLIAM H. STUDDARD.

Vitnesses 7 WV. J FLANAGAN, MARTHA FLANAGAN.

These COIIDGCtlOHS are also (5X-

